4.  http://science.education.nih.gov/supple ments/nih2/addiction/activities/lesson2_ neurotransmission.htm

5. For more detail go to:  http://web.williams.edu/imput/synapse/in dex.html

16. You also have access to: scopolamine - a chemical which blocks acetylcholine receptor sites physostigmine - a chemical which blocks cholinesterase (cholinesterase does the "clean up" of the acetylcholine from the synapse, returning the neuron to its resting state)

17. Now read about Martinez and Kesner’s (1991) research